N944H

01 /  Registration

Filed with the Federal Aviation Administration

Every cell below is a literal field from the FAA Aircraft Registry. Click any value to open the FAA registry record for N944H.

02 /  NTSB Records

Events on file with the National Transportation Safety Board

03 /  Airworthiness Directives

Applicable to BELL 407

Federal Aviation Administration airworthiness directives matched to make and model. Each entry links to the Federal Register publication.

• Feb 3, 2026

  Airworthiness Directives; Bell Textron Canada Limited Helicopters

  The FAA proposes to adopt a new airworthiness directive (AD) for certain Bell Textron Canada Limited (BTCL) Model 407 helicopters. This proposed AD was prompted by a determination that chafing can occur at various locations on the electrical harnesses located in the aircraft instrument panel area. This proposed AD would require a one- time detailed visual i…

  Federal Register →

• Nov 18, 2025

  Airworthiness Directives; Bell Textron Canada Limited Helicopters

  The FAA proposes to adopt a new airworthiness directive (AD) for certain Bell Textron Canada Limited (Bell) Model 407 helicopters. This proposed AD was prompted by a report of a fractured pilot cyclic stick tube and subsequent findings of other pilot cyclic stick tubes with fatigue cracking. This proposed AD would require repetitively inspecting the pilot c…

  Federal Register →

• Jun 23, 2025

  Airworthiness Directives; Bell Textron Canada Limited Helicopters

  The FAA is adopting a new airworthiness directive (AD) for all Bell Textron Canada Limited (BTCL) Model 407 and 427 helicopters. This AD was prompted by a report that certain expandable blade bolts installed on the main rotor blade may not have received the correct heat treatment, which could result in stress corrosion cracking of the expandable blade bolts…

  Federal Register →

• Oct 31, 2024

  Airworthiness Directives; Various Helicopters

  The FAA is adopting a new airworthiness directive (AD) for various helicopters modified by certain supplemental type certificates (STCs) that approve the installation of an emergency float kit or an emergency float with a liferaft kit. This AD was prompted by the results of an accident investigation and subsequent reports of difficulty pulling the emergency…

  Federal Register →

• Jul 18, 2024

  Airworthiness Directives; Bell Textron Canada Limited Helicopters

  The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 407 helicopters. This AD was prompted by a report that a certain part-numbered fuel system standpipe assembly (standpipe) may have sharp edges at the interval weld joints due to a quality escape during the manufacturing process. This AD requires inspecting c…

  Federal Register →

• Apr 25, 2024

  Airworthiness Directives; Various Helicopters

  The FAA proposes to adopt a new airworthiness directive (AD) for various helicopters modified by certain supplemental type certificates (STCs) that approve the installation of an emergency float kit or an emergency float with liferaft kit. This proposed AD was prompted by the results of an accident investigation and subsequent reports of difficulty pulling…

  Federal Register →

• Feb 20, 2024

  Airworthiness Directives; Bell Textron Canada Limited Helicopters

  The FAA proposes to adopt a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 407 helicopters. This proposed AD was prompted by a report that a certain part-numbered fuel system standpipe assembly (standpipe) may have sharp edges at the interval weld joints due to a quality escape during the manufacturing process. This proposed…

  Federal Register →

• Sep 6, 2023

  Airworthiness Directives; Bell Textron Canada Limited Helicopters

  The FAA is adopting a new airworthiness directive (AD) for all Bell Textron Canada Limited Model 407 helicopters. The FAA previously sent this AD as an emergency AD to all known U.S. owners and operators of these helicopters. This AD was prompted by a report of a disbonded area in a tail rotor (T/R) blade. This AD requires determining if an affected T/R bla…

  Federal Register →

• Dec 28, 2022

  Airworthiness Directives; Bell Textron Canada Limited Helicopters

  The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 407 helicopters. This AD was prompted by an accident. This AD requires inspecting the tailboom attachment structure, as specified in a Transport Canada AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on thes…

  Federal Register →

• Nov 29, 2022

  Airworthiness Directives; Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Helicopters

  The FAA is superseding Airworthiness Directive (AD) 99-23-18, AD 2005-03-07, AD 2013-12-07, and AD 2014-04-07, which applied to certain Bell Helicopter Textron Canada (now Bell Textron Canada Limited) Model 407 helicopters. AD 99-23-18 required revising the life limits for certain parts, replacing each part that had exceeded its life limit, and revising the…

  Federal Register →

• Aug 15, 2022

  Airworthiness Directives; Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Helicopters

  The FAA proposes to supersede Airworthiness Directive (AD) 99- 23-18, AD 2005-03-07, AD 2013-12-07, and AD 2014-04-07, which apply to certain Bell Helicopter Textron Canada (now Bell Textron Canada Limited) Model 407 helicopters. AD 99-23-18 requires revising the life limits for certain parts, replacing each part that has exceeded its life limit, and revisi…

  Federal Register →

• Sep 8, 2021

  Airworthiness Directives; Bell Textron Canada Limited Helicopters

  The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 206, 206A, 206A-1 (OH-58A), 206B, 206B-1, 206L, 206L-1, 206L-3, 206L-4, 222, 222B, 222U, 230, 407, 427, 429, and 430 helicopters. This AD was prompted by a report of a shoulder harness seat belt comfort clip (comfort clip) interfering with the seat belt iner…

  Federal Register →

• Jul 6, 2021

  Airworthiness Directives; Bell Textron Canada Limited Helicopters

  The FAA proposes to adopt a new airworthiness directive (AD) for Bell Textron Canada Limited (Bell) Model 206, 206A, 206A-1 (OH- 58A), 206B, 206B-1, 206L, 206L-1, 206L-3, 206L-4, 222, 222B, 222U, 230, 407, 427, 429, and 430 helicopters. This proposed AD would require removing each shoulder harness seat belt comfort clip (comfort clip) from service, inspecti…

  Federal Register →

• May 20, 2019

  Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters

  We are adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada Limited (Bell) Model 206A, 206B, 206L, 206L- 1, 206L-3, 206L-4, and 407 helicopters. This AD requires inspecting and cleaning the oil supply restrictor (restrictor) to the freewheel assembly. This AD was prompted by reports of a blocked oil line restrictor in the freewheel…

  Federal Register →

• Apr 24, 2019

  Airworthiness Directives; Northrop Grumman LITEF GmbH LCR-100 Attitude and Heading Reference System Units

  We are adopting a new airworthiness directive (AD) for Northrop Grumman LITEF GmbH LCR-100 Attitude and Heading Reference System (AHRS) units installed on various aircraft. This AD requires removing certain LCR-100 AHRS units from service. This AD was prompted by test results showing loss of or invalid data. The actions of this AD are intended to prevent an…

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• Dec 17, 2018

  Airworthiness Directives; Air Comm Corporation Air Conditioning Systems

  We are adopting a new airworthiness directive (AD) for Air Comm Corporation (Air Comm) air conditioning systems installed on various model helicopters. This AD requires replacing electrical connectors and prohibits the installation of other parts. This AD was prompted by reports of overheated connectors. The actions of this AD are intended to address an uns…

  Federal Register →

• Aug 21, 2018

  Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters

  We propose to adopt a new airworthiness directive (AD) for Bell Helicopter Textron Canada Limited (Bell) Model 206A, 206B, 206L, 206L-1, 206L-3, 206L-4, and 407 helicopters. This proposed AD would require inspecting and cleaning the oil supply restrictor (restrictor) to the freewheel assembly. This proposed AD is prompted by reports of a blocked oil line re…

  Federal Register →

• May 21, 2018

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters

  We are adopting a new airworthiness directive (AD) for Bell Model 407 helicopters. This AD requires repetitive inspections of the tail rotor (TR) driveshaft segment assemblies and a torque check of the TR adapter retention nuts. This AD was prompted by a report of an in- flight failure of the TR drive system. The actions of this AD are intended to detect an…

  Federal Register →

• Jan 11, 2018

  Airworthiness Directives; Air Comm Corporation Air Conditioning Systems

  We propose to adopt a new airworthiness directive (AD) for Air Comm Corporation (Air Comm) air conditioning systems installed on various model helicopters. This proposed AD would require replacing electrical connectors and would prohibit the installation of other parts. This proposed AD is prompted by reports of overheated connectors. The proposed actions a…

  Federal Register →

• Jul 7, 2017

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters

  We propose to adopt a new airworthiness directive (AD) for Bell Model 407 helicopters. This proposed AD would require repetitive inspections of the tail rotor (TR) driveshaft segment assemblies and a torque check of the TR adapter retention nuts. This proposed AD is prompted by a report of an in-flight failure of the TR drive system. The proposed actions ar…

  Federal Register →

• Jun 6, 2017

  Airworthiness Directives; Honeywell International Inc. (Honeywell) Enhanced Ground Proximity Warning System (EGPWS)

  We propose to adopt a new airworthiness directive (AD) for various normal and transport category rotorcraft with certain Honeywell EGPWS installed. This proposed AD would require updating the software version of the EGPWS. This proposed AD is prompted by a software defect that prevents the EGPWS from providing terrain warnings. The proposed actions are inte…

  Federal Register →

• Jun 5, 2017

  Airworthiness Directives; Northrop Grumman LITEF GmbH LCR-100 Attitude and Heading Reference System Units

  We propose to adopt a new airworthiness directive (AD) for Northrop Grumman LITEF GmbH LCR-100 Attitude and Heading Reference System (AHRS) units installed on various aircraft. This proposed AD would require removing certain LCR-100 AHRS units from service. This proposed AD is prompted by test results showing loss of or invalid data. The proposed actions ar…

  Federal Register →

• Aug 20, 2015

  Airworthiness Directives; Bell Helicopter Textron Canada (Bell) Helicopters

  We are superseding Airworthiness Directive (AD) 2001-13-51 for Bell Model 206L-4, 407, and 427 helicopters. AD 2001-13-51 required inspecting certain driveshafts for a crack, a loose bolt or nut, or red powder residue and replacing a driveshaft if there is a crack, a loose bolt or nut, or red powder residue. AD 2001-13-51 also required notifying the FAA wit…

  Federal Register →

• Mar 16, 2015

  Airworthiness Directives; Bell Helicopter Textron Canada Helicopters

  We are adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) Model 407 helicopters. This AD requires inspecting the aft fuselage upper skin (upper skin) for a crack and the upper left longeron assembly (longeron assembly) for a crack, corrosion, or defect. This AD requires replacing or repairing a part or section, depending o…

  Federal Register →

• Sep 15, 2014

  Airworthiness Directives; Bell Helicopter Textron Canada (Bell) Helicopters

  We propose to supersede airworthiness directive (AD) 2001-13- 51 for Bell Model 206L-4, 407, and 427 helicopters. AD 2001-13-51 currently requires inspecting certain driveshafts for a crack, a loose bolt or nut, or red powder residue and replacing a driveshaft if there is a crack, a loose bolt or nut, or red powder residue. AD 2001-13-51 also requires notif…

  Federal Register →

• Jun 23, 2014

  Airworthiness Directives; Bell Helicopter Textron Canada (Bell) Helicopters

  We are superseding Airworthiness Directive (AD) 2003-05-03 for Bell Model 407 helicopters. AD 2003-05-03 required preflight checking and repetitively inspecting for a crack in certain tailbooms that have been redesigned, replacing the tailboom if there is a crack, modifying and re-identifying certain tailbooms, installing an improved horizontal stabilizer a…

  Federal Register →

• Feb 12, 2014

  Airworthiness Directives; Bell Helicopter Textron Canada Helicopters

  We propose to adopt a new airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) Model 407 helicopters. This proposed AD would require inspecting the aft fuselage upper skin (upper skin) for a crack and the upper left longeron assembly (longeron assembly) for a crack, corrosion, or defect. This AD would require replacing or repairing a part…

  Federal Register →

• Nov 8, 2013

  Airworthiness Directives; Bell Helicopter Textron, Inc., Helicopters

  We are adopting a new airworthiness directive (AD) for Bell Helicopter Textron, Inc. (Bell), Model 206A, 206B, 206L, 206L-1, 206L- 3, 206L-4, and 407 helicopters with an Apical Industries, Inc. (Apical) emergency float kit installed under Supplemental Type Certificate (STC) Number SR01535LA. This AD was prompted by an incident in which the floats installed…

  Federal Register →

• Oct 31, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada (Bell) Helicopters

  We are adopting a new airworthiness directive (AD) for Bell Model 206L-4 and 407 helicopters. This AD requires replacing or reworking certain aft bearing caps. This AD was prompted by the manufacture of certain freewheel aft bearing caps without a lubrication channel to allow oil flow into the aft bearing support assembly. The actions of this AD are intende…

  Federal Register →

• Oct 31, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters

  We are adopting a new airworthiness directive (AD) for certain Bell Model 407 helicopters. This AD requires installing a placard beneath the NR/NP dual tachometer and revising the limitations section of the rotorcraft flight manual (RFM). This AD was prompted by several incidents of third stage engine turbine wheel failures, which were caused by excessive v…

  Federal Register →

• Sep 12, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters

  We are adopting a new airworthiness directive (AD) for Bell Model 206A, 206B, 206L, 206L-1, 206L-3, 206L-4, 222, 222B, 222U, 230, 407, 427, and 430 helicopters. This AD requires inspecting each bearing to determine if it has been properly staked and replacing the bearing or assembly if it has not been properly staked. This AD was prompted by bearings not be…

  Federal Register →

• Jul 12, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada (Bell) Helicopters

  We propose to supersede an existing airworthiness directive (AD) for the Bell Model 407 helicopters. The existing AD currently requires preflight checking and repetitively inspecting for a crack in certain tailbooms that have been redesigned, replacing the tailboom if there is a crack, modifying and re-identifying certain tailbooms, installing an improved h…

  Federal Register →

• Jun 27, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada Helicopters

  We are adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) Model 407 helicopters with certain tailboom assemblies installed. This AD requires, at specified intervals, inspecting the tailboom assembly for a crack, loose rivet, or other damage. This AD was prompted by a stress analysis of the tailboom skin that revealed that…

  Federal Register →

• Jun 20, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada (Bell) Model Helicopters

  We propose to adopt a new airworthiness directive (AD) for Bell Model 206L-4 and 407 helicopters. This proposed AD would require replacing or reworking certain aft bearing caps. This proposed AD is prompted by the manufacture of certain freewheel aft bearing caps without a lubrication channel to allow oil flow into the aft bearing support assembly. The prop…

  Federal Register →

• Jun 7, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters

  We propose to adopt a new airworthiness directive (AD) for certain Bell Model 407 helicopters. This proposed AD would require installing a placard beneath the NR/NP dual tachometer and revising the limitations section of the rotorcraft flight manual (RFM). This proposed AD is prompted by several incidents of third stage engine turbine wheel failures, which…

  Federal Register →

• Jun 5, 2013

  Airworthiness Directives; Bell Helicopter Textron, Inc. Helicopters

  We propose to adopt a new airworthiness directive (AD) for Bell Helicopter Textron, Inc. (Bell) Model 206A, 206B, 206L, 206L-1, 206L-3, 206L-4, and 407 helicopters with an Apical Industries, Inc. (Apical) emergency float kit installed under supplemental type certificate (STC) number SR01535LA. This proposed AD would require inspecting, labeling, and replaci…

  Federal Register →

• May 13, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Model Helicopters

  We propose to adopt a new airworthiness directive (AD) for Bell Model 206A, 206B, 206L, 206L-1, 206L-3, 206L-4, 222, 222B, 222U, 230, 407, 427, and 430 helicopters. This proposed AD would require inspecting each bearing to determine if it has been properly staked and replacing the bearing or assembly if it has not been staked properly. This proposed AD is p…

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• Mar 22, 2013

  Airworthiness Directives; Bell Helicopter Textron, Inc.

  We are adopting a new airworthiness directive (AD) for Bell Helicopter Textron, Inc. (Bell), Model 412 and 412EP helicopters. This AD requires establishing a lower life limit on certain swashplate outer ring assemblies (outer ring), revising the retirement life on the components' history card or equivalent record, and revising the maintenance manual or Inst…

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• Feb 1, 2013

  Airworthiness Directives; Bell Helicopter Textron Canada Helicopters

  We propose to adopt a new airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) Model 407 helicopters with certain tailboom assemblies installed. This proposed AD would require, at specified intervals, inspecting the tailboom assembly for a crack, loose rivet, or other damage. This proposed AD is prompted by a stress analysis of the tailboo…

  Federal Register →

• Sep 24, 2012

  Airworthiness Directives; Bell Helicopter Textron, Inc.

  We propose to adopt a new airworthiness directive (AD) for Bell Helicopter Textron, Inc. (Bell), Model 412 and 412EP helicopters. This proposed AD is prompted by reports of cracking in the swashplate outer ring assemblies (outer ring). This AD would establish a lower life limit on certain outer rings, requiring a revision of the retirement life on the compo…

  Federal Register →

• Sep 17, 2012

  Airworthiness Directives; Bell Helicopter Textron Canada Helicopters

  We are adopting a new airworthiness directive (AD) for the Bell Helicopter Textron Canada Limited (BHTC) Model 407 helicopters. This AD requires you to replace tailboom-attachment hardware (attachment hardware), and perform initial and recurring determinations of the torque on the nuts of the tailboom-attachment bolts (bolts) at all four attachment location…

  Federal Register →

• Jul 19, 2012

  Airworthiness Directives; Bell Helicopter Textron Canada Helicopters

  We are adopting an airworthiness directive (AD) superseding an existing airworthiness directive for Bell Helicopter Textron Canada (Bell) Model 407 and 427 helicopters. The existing AD requires inspecting certain hydraulic servo actuators (servo) to determine whether the shaft turns independently of the nut or the clevis assembly, and additional actions bas…

  Federal Register →

• Mar 29, 2012

  Airworthiness Directives; Bell Helicopter Textron Canada Helicopters

  We propose to adopt a new airworthiness directive (AD) for the Bell Helicopter Textron Canada Limited (BHTC) Model 407 helicopters. This proposed AD is prompted by a review of the tailboom-attachment installation, which revealed that the torque value of the bolts specified in the BHTC Model 407 Maintenance Manual and applied during manufacturing was incorre…

  Federal Register →

• Dec 13, 2011

  Airworthiness Directives; Apical Industries, Inc., (Apical) Emergency Float Kits

  This amendment adopts a new airworthiness directive (AD) for the Apical emergency float kits installed on certain model helicopters under supplemental type certificates. This AD requires adding placards on each side of the fuselage to identify the location and operation of the liferaft external inflation handle. This AD also requires replacing each liferaft…

  Federal Register →

• Oct 27, 2011

  Airworthiness Directives; Bell Helicopter Textron Canada (Bell) Model 407 and 427 Helicopters

  This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2011-15-51, which was sent previously to all known U.S. owners and operators of the specified Bell Model 407 and 427 helicopters by individual letters. This AD requires inspecting certain hydraulic servo actuators to determine whether the shaft turns independe…

  Federal Register →

• Mar 10, 2011

  Airworthiness Directives; Bell Helicopter Textron Canada Limited (BHTC) Model 206A, 206B, 206L, 206L-1, 206L-3, 206L-4, 222, 222B, 222U, 230, 407, 427, and 430 Helicopters

  This document publishes in the Federal Register an amendment adopting Emergency Airworthiness Directive (AD) 2010-26-51, which was sent previously to all known U.S. owners and operators of the specified model helicopters by individual letters. This AD also supersedes existing AD 2009-08-03. This AD is prompted by another incident in which the tail rotor bla…

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• Dec 7, 2010

  Airworthiness Directives; Apical Industries Inc. (Apical) Emergency Float Kits

  This document proposes adopting a new airworthiness directive (AD) for the Apical emergency float kits installed on certain model helicopters under supplemental type certificates. This proposal would require adding placards on each side of the fuselage to identify the location and operation of the liferaft external inflation handle. The proposal would also…

  Federal Register →

• Dec 11, 2009

  Airworthiness Directives; Bell Helicopter Textron Canada (BHTC) Model 407 and Model 427 Helicopters

  We are adopting a new airworthiness directive (AD) for the BHTC Model 407 and Model 427 helicopters. This AD results from mandatory continuing airworthiness information (MCAI) ADs issued by the aviation authority of Canada. The MCAI ADs state that some hydraulic pump driveshaft assemblies may have been delivered with a missing internal plug or fastening riv…

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04 /  Service Difficulty Reports

FAA SDR filings

The FAA does not currently expose a public API for Service Difficulty Reports. We do not back-fill or paraphrase. Search the FAA SDR portal directly →

05 /  Sources & Methodology

Every fact on this page links to its primary US-government source

• FAA Aircraft Registry →

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  Available

• NTSB CAROL →

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• Federal Register (FAA Airworthiness Directives) →

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• FAA Service Difficulty Reports →

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We render only what the agency publishes. Found a factual error? Report it → We acknowledge within 5 business days and resolve within 14.